Looking Beyond the Rheem RTG Series 9.5 GPM Liquid Propane Tankless Water Heater? 6 Alternatives Worth a Look
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The rheem rtg series 9 5 gpm liquid propane tankless water heater delivers high output for whole-house use. It provides 9.5 GPM at a 35°F rise and fits outdoor spaces with its non-condensing design. You get precise digital control and strong safety features in a compact metal cabinet.
Some buyers may need indoor installation, natural gas fuel, or a different flow rate. Others might prefer a more compact unit or a specialized portable option for camping. This list includes 6 alternatives that share key specifications with the original. We selected these models because their specs overlap with your potential needs. Each option offers distinct advantages based on fuel type, installation location, and flow capacity. You can find a better fit by comparing these practical details.
Our top pick: Rheem RTG 9.5 GPM Outdoor Propane Tankless Heater.
How alternatives compare to Rheem RTG
Rheem RTG 9.5 GPM Outdoor Natural Gas Tankless Heater
This Rheem model swaps liquid propane for natural gas while keeping the same 9.5 GPM flow rate at a 35°F rise. It shares the non-condensing outdoor design and compact 20.8-inch height of the original unit. You get identical digital temperature control and WiFi connectivity in a gray cabinet. The main difference is fuel source, which matters if your home has natural gas lines instead of propane tanks. This option suits buyers who want high-volume hot water for outdoor installation but prefer natural gas convenience. It maintains the same safety certifications and mounting requirements as the propane version.
Rinnai 6.1 GPM Outdoor Propane Water Heater
The Rinnai unit offers a lower 6.6 GPM flow rate compared to the original 9.5 GPM, making it better for smaller households or single-bathroom setups. It uses propane and features a non-condensing outdoor design similar to the Rheem RTG. However, it is taller at 24.6 inches and weighs more at 49.2 pounds. The silver finish differs from the gray Rheem cabinet. This model prioritizes durability and a strong heat exchanger warranty over maximum flow capacity. You should choose this if you need a compact propane solution for outdoor use and do not require high-volume simultaneous showering. It lacks the WiFi features found in the Rheem models.
Rheem RTG 9.5 GPM Natural Gas Water Heater
This Rheem variant uses natural gas instead of propane and is designed for indoor installation rather than outdoor mounting. It delivers the same 9.5 GPM flow rate but requires venting for indoor use. The unit is slightly taller at 24.2 inches and includes WiFi connectivity for remote control. You gain smart home integration but lose the outdoor versatility of the original RTG. This model suits whole-house heating needs where indoor placement is necessary. It offers precise temperature control and high output for multi-bathroom homes. The trade-off is the need for proper indoor venting infrastructure compared to the outdoor-ready propane model.
Rheem RTGH 9.5 GPM Propane Tankless Water Heater
The Rheem RTGH indoor propane model provides the same 9.5 GPM flow rate but is built for indoor installation with a higher 0.93 UEF rating. It is wider at 17.7 inches and taller at 23.7 inches compared to the outdoor unit. This indoor design requires venting and professional installation. You get precise digital temperature control and WiFi connectivity in a larger gray cabinet. This option suits large households needing high-efficiency indoor propane heating. It sacrifices outdoor placement flexibility for improved energy efficiency and smart features. The unit is heavier at 59.9 pounds, requiring a sturdy wall mount. Choose this if you prioritize indoor efficiency over outdoor convenience.
Rheem RTG Series 7.0 GPM Propane Tankless Water Heater
This Rheem model reduces the flow rate to 7.0 GPM, making it suitable for homes with moderate hot water demands. It uses propane and is designed for indoor installation with non-condensing venting. The unit features WiFi connectivity and precise digital temperature control similar to the original. It is taller at 24.2 inches and weighs 46.5 pounds. You gain energy efficiency and space savings but lose the high-volume output of the 9.5 GPM model. This option suits households with fewer simultaneous water uses. It offers reliable indoor propane heating with smart control features. Choose this if you prioritize efficiency and precise temperature management over maximum flow capacity.
Camplux 5L Portable Propane Water Heater
The Camplux unit is a portable propane water heater designed for camping and off-grid use. It has a much lower flow rate and smaller dimensions, measuring 14.8 inches in length. The white cabinet is compact and lightweight at 10 pounds. It operates on propane and includes overheat protection for safety. This model lacks the high flow rate and indoor/outdoor residential features of the Rheem RTG. You get portability and low-pressure operation instead of whole-house heating. This option suits travelers and campers who need temporary hot water solutions. It is not suitable for permanent home installation. The trade-off is convenience and mobility for significantly reduced capacity and flow.
Quick picks
Our 7 picks
Rheem RTG 9.5 GPM Outdoor Propane Tankless Heater
Best for: large households with outdoor mounting space
- Fuel Type
- Liquid Propane
- Flow Rate
- 9.5 GPM at 35°F rise
- BTU
- 199,900 BTU/hr
- Installation Location
- Outdoor
- Temperature Control
- Digital LED, ±1°F
- Certification
- CSA
View on Amazon: Rheem RTG 9.5 GPM Outdoor Propane Tankless Heater Affiliate link
The Rheem RTG Series delivers 9.5 GPM of hot water at a 35°F rise, powered by 199,900 BTUs of liquid propane. Its non-condensing design requires outdoor installation, which eliminates the need for complex venting. You get precise digital temperature control with ±1°F adjustments and built-in freeze protection. This unit suits large homes needing high flow rates for multiple simultaneous showers.
Pros
- 9.5 GPM flow rate supports 3-4 simultaneous showers
- 199,900 BTU/hr output for high performance
- Digital LED panel with ±1°F precision
- Outdoor installation saves space and venting costs
- 15-year heat exchanger warranty
Cons
- Requires outdoor installation only
- Non-condensing design is less efficient than condensing models
- No WiFi connectivity in this specific 9.5 GPM non-WiFi variant
Good fit if
- You need high flow for a large household
- You have an outdoor wall for mounting
- You want precise temperature control without app complexity
Skip if
- You require indoor installation
- You need WiFi remote monitoring
- You are looking for a condensing unit for maximum efficiency
Verdict: Rheem RTG 9.5 GPM Propane Outdoor is a robust choice for large families who can install the unit outside and need reliable, high-volume hot water without the need for smart features.
Rheem RTG 9.5 GPM Outdoor Natural Gas Tankless Heater
Best for: high-flow outdoor natural gas needs
- Fuel Type
- Natural Gas
- Flow Rate
- 9.5 GPM
- BTU
- 199,900 BTU/hr
- Installation Location
- Outdoor
- Temperature Control
- ±1°F
- Certification
- CSA
View on Amazon: Rheem RTG 9.5 GPM Outdoor Natural Gas Tankless Heater Affiliate link
The Rheem RTG-95XLN-3 is a natural gas unit delivering 9.5 GPM at a 35°F rise. It outputs 199,900 BTUs with a 0.82 UEF. The outdoor design removes venting needs. Digital controls adjust temperature within ±1°F. It weighs 39.3 pounds. This model suits homes needing high flow rates for multiple bathrooms.
Pros
- 9.5 GPM flow rate supports 3-4 simultaneous showers
- Outdoor installation eliminates complex venting requirements
- Digital LED panel offers ±1°F temperature precision
- 0.82 UEF provides high energy efficiency
- CSA certified with built-in freeze protection
Cons
- Requires professional installation
- Outdoor placement only
- No WiFi connectivity on this specific variant
Good fit if
- You need high flow for multiple bathrooms
- You prefer outdoor installation to avoid venting
- You want precise digital temperature control
Skip if
- You require indoor installation
- You need WiFi remote management
- You use propane fuel instead of natural gas
Verdict: Rheem RTG 9.5 GPM Natural Gas Outdoor fits homes with high hot water demands and outdoor mounting options. It delivers consistent flow and precise temperature control without the need for venting.
Rinnai 6.1 GPM Outdoor Propane Water Heater
Best for: Outdoor propane users needing compact durability
- Fuel Type
- Propane
- Flow Rate
- 6.1 GPM
- BTU
- 160k BTU
- Installation Location
- Outdoor
- Dimensions
- 24.6 x 14.1 x 10.8 in
- Venting Type
- Non-Condensing
View on Amazon: Rinnai 6.1 GPM Outdoor Propane Water Heater Affiliate link
The Rinnai RE160eP is a non-condensing propane tankless water heater designed for outdoor installation. It delivers up to 6.6 GPM of hot water, supporting five simultaneous fixtures. Measuring 24.6 x 14.1 x 10.8 inches, it fits compact spaces. The unit includes an LED screen for error codes and service reminders. You should choose this model if you need reliable propane heating with a durable heat exchanger warranty.
Pros
- Provides up to 6.6 GPM flow rate for multiple fixtures
- Compact outdoor design measures 24.6 x 14.1 x 10.8 inches
- 15-year limited warranty on the heat exchanger
- LED screen displays service reminders and error codes
Cons
- Lower flow rate of 6.6 GPM compared to 9.5 GPM competitors
- Requires professional installation for proper setup
- WiFi control module is sold separately
Good fit if
- You need a propane heater for outdoor use
- You want a compact unit that fits in small spaces
- You prefer a non-condensing design for easier venting
Skip if
- You require a flow rate above 6.6 GPM
- You need indoor installation capabilities
- You want built-in WiFi control without extra purchases
Verdict: Rinnai RE160eP 6.6 GPM Propane Outdoor Heater suits buyers who prioritize a compact, durable propane unit for outdoor use. It fits homes needing moderate hot water flow with a strong heat exchanger warranty.
Rheem RTG 9.5 GPM Natural Gas Water Heater
Best for: Whole-house natural gas heating with smart control
- Fuel Type
- Natural Gas
- Flow Rate
- 9.5 GPM
- BTU
- 199,900 BTU/hr
- Installation Location
- Indoor
- Temperature Control
- ±1°F
- Certification
- CSA
View on Amazon: Rheem RTG 9.5 GPM Natural Gas Water Heater Affiliate link
This Rheem RTG Series unit delivers 9.5 GPM of natural gas heating for whole-house residential use. It features 199,900 BTU/hr output and a 0.82 Uniform Energy Factor. The indoor design includes a digital LED panel with ±1°F precision. WiFi connectivity allows remote monitoring. It suits large families needing 3-4 simultaneous showers while saving space with a wall-mount build.
Pros
- 9.5 GPM flow rate supports 3-4 simultaneous showers
- 199,900 BTU/hr high efficiency output
- Digital LED control with ±1°F temperature precision
- WiFi enabled for remote monitoring
Cons
- Indoor installation only requires dedicated venting
- Non-condensing design may be less efficient than condensing models
- Professional installation is required
Good fit if
- You need a whole-house solution for large families
- You want precise temperature control via WiFi
- You have indoor space for wall-mount installation
Skip if
- You require outdoor installation capability
- You prefer propane fuel over natural gas
- You want a DIY-friendly setup without professional help
Verdict: Rheem RTG 9.5 GPM Natural Gas Indoor offers high output and smart features for homes needing reliable whole-house hot water. It fits buyers who prioritize precision and connectivity over outdoor versatility.
Rheem RTGH 9.5 GPM Propane Tankless Water Heater
Best for: large indoor propane homes needing high flow
- Fuel Type
- Liquid Propane
- Flow Rate
- 9.5 GPM
- BTU
- 199,900 BTU/hr
- Installation Location
- Indoor
- Temperature Control
- ±1°F
- Certification
- CSA
View on Amazon: Rheem RTGH 9.5 GPM Propane Tankless Water Heater Affiliate link
The Rheem RTGH Series 9.5 GPM Liquid Propane model delivers 199,900 BTU/hr for whole-house hot water. It features industry-leading condensing technology with a 0.93 Uniform Energy Factor. This indoor unit includes a digital LED display with ±1°F precision. It is designed for large families needing multiple simultaneous showers. The compact 23.7-inch height fits standard utility spaces.
Pros
- 0.93 Uniform Energy Factor for ultra-low gas bills
- 9.5 GPM flow rate at 35°F rise
- Digital LED temperature control with ±1°F precision
- Built-in freeze protection and multi-point safety system
Cons
- Indoor installation only; not suitable for outdoor use
- No WiFi connectivity in this specific 9.5 GPM variant
- 5-year parts warranty is shorter than the heat exchanger coverage
Good fit if
- You need high-capacity hot water for 3-4 simultaneous showers
- You require an indoor propane unit with direct venting
- You want precision temperature control within ±1°F
Skip if
- You need an outdoor-rated tankless water heater
- You want remote WiFi control for this specific model
- You are looking for a portable or camping unit
Verdict: Rheem RTGH 9.5 GPM Propane Indoor is a high-efficiency choice for large households needing reliable indoor propane heating. Its 0.93 UEF and precise digital control make it ideal for multi-bathroom homes.
Rheem RTG Series 7.0 GPM Propane Tankless Water Heater
Best for: Indoor propane homes needing precise temp control
- Fuel Type
- Liquid Propane
- Flow Rate
- 7.0 GPM
- BTU
- 160,000 BTU/hr
- Installation Location
- Indoor
- Temperature Control
- ±1°F
- Certification
- CSA
View on Amazon: Rheem RTG Series 7.0 GPM Propane Tankless Water Heater Affiliate link
This Rheem RTG unit delivers 7.0 GPM at a 35°F rise, powered by 160,000 BTUs of liquid propane. It features an 0.82 UEF rating for efficiency and precise ±1°F digital temperature control. Designed for indoor installation, it fits homes with two to three simultaneous water points. The compact 24.2-inch height saves space while providing reliable on-demand hot water for residential use.
Pros
- 7.0 GPM flow rate supports 2-3 showers
- 160,000 BTU/hr output for high performance
- 0.82 UEF energy efficiency rating
- Precise ±1°F digital temperature control
Cons
- Lower 7.0 GPM capacity compared to 9.5 GPM models
- Indoor installation only, not outdoor rated
- No WiFi connectivity in this specific variant
Good fit if
- You need a propane unit for indoor use
- You require precise temperature adjustments
- You have space for a 24.2-inch vertical unit
Skip if
- You need outdoor installation capability
- You require 9.5 GPM flow for large homes
- You want WiFi smart home integration
Verdict: Rheem RTG 7.0 GPM Propane Indoor is a solid choice for indoor propane setups needing precise control. It suits households with moderate hot water demands who prioritize efficiency and space savings over maximum flow rates.
Camplux 5L Portable Propane Water Heater
Best for: camping and off-grid showers
- Fuel Type
- Propane
- Flow Rate
- 1.32 GPM
- Installation Location
- Outdoor
- Certification
- CSA
- Dimensions
- 4.33 x 11.4 x 14.8 inches
- Use
- Camping, RV
View on Amazon: Camplux 5L Portable Propane Water Heater Affiliate link
This portable propane unit delivers 1.32 GPM for outdoor use. It weighs just 10 lbs and measures 14.8 by 11.4 by 4.33 inches. The device requires no electricity, starting with only 3.0 PSI of water pressure. It features CSA certification and six safety protections. You can use it for camping or RV trips where power is limited.
Pros
- 1.32 GPM flow rate for instant hot water
- Only 10 lbs weight with folding handle
- Starts with 3.0 PSI water pressure
- CSA certified with overheat protection
- No electricity needed for operation
Cons
- Low 1.32 GPM flow rate limits simultaneous use
- Requires 2 D-size batteries for ignition
- Outdoor installation only
Good fit if
- You need a lightweight heater for camping trips
- You are in an off-grid location without electricity
- You want a CSA-certified unit for safety
Skip if
- You need high flow for multiple showers
- You want an indoor installation option
- You prefer a unit that does not require batteries
Verdict: Camplux 5L Portable Propane Water Heater is a compact, battery-powered solution for campers. It suits travelers who prioritize portability and low-pressure operation over high flow rates.
Specifications side by side
| Spec | Rheem RTG 9.5 GPM Outdoor Propane Tankless Heater | Rheem RTG 9.5 GPM Outdoor Natural Gas Tankless Heater | Rinnai 6.1 GPM Outdoor Propane Water Heater | Rheem RTG 9.5 GPM Natural Gas Water Heater | Rheem RTGH 9.5 GPM Propane Tankless Water Heater | Rheem RTG Series 7.0 GPM Propane Tankless Water Heater | Camplux 5L Portable Propane Water Heater |
|---|---|---|---|---|---|---|---|
| Fuel Type | Liquid Propane | Natural Gas | Propane | Natural Gas | Liquid Propane | Liquid Propane | Propane |
| Flow Rate | 9.5 GPM at 35°F rise | 9.5 GPM | 6.1 GPM | 9.5 GPM | 9.5 GPM | 7.0 GPM | 1.32 GPM |
| BTU | 199,900 BTU/hr | 199,900 BTU/hr | 160k BTU | 199,900 BTU/hr | 199,900 BTU/hr | 160,000 BTU/hr | not stated |
| Installation Location | Outdoor | Outdoor | Outdoor | Indoor | Indoor | Indoor | Outdoor |
| Temperature Control | Digital LED, ±1°F | ±1°F | not stated | ±1°F | ±1°F | ±1°F | not stated |
| Certification | CSA | CSA | not stated | CSA | CSA | CSA | CSA |
| Dimensions | 20.8 x 13.5 x 9.4 inches | 20.8 x 13.5 x 9.4 inches | 24.6 x 14.1 x 10.8 in | 24.2 x 13.5 x 10.3 inches | 23.7 x 17.7 x 9.8 inches | 24.2 x 13.5 x 10.3 inches | 4.33 x 11.4 x 14.8 inches |
| Use | not stated | not stated | not stated | not stated | not stated | not stated | Camping, RV |
| Venting Type | Non-Condensing | Non-Condensing | Non-Condensing | Non-Condensing | not stated | Non-Condensing | not stated |
| Features | WiFi | WiFi | not stated | WiFi | WiFi | WiFi | Overheat Protection |
| Weight | 39.3 pounds | 39.3 pounds | 49.2 pounds | 46.5 pounds | 59.9 pounds | 46.5 pounds | 10 pounds |
| Size | 9.5 GPM (Non-WiFi) | 9.5 GPM (No WiFi) | 6.6 GPM | 9.5 GPM (WiFi) | 9.5 GPM (Without WiFi) | 7.0 GPM (No WiFi) | Classic |
| Color | Gray | Gray | Silver | Gray | Gray | Gray | White |
| Model | RTG-95XLP-3 | RTG-95XLN-3 | REU-VE2125WD-US-P | RTG-95DVELN-3 | RTGH-95DVLP-3 | RTG-70DVLP-3 | AY132 |
If you use fuel tanks outdoors, you can evaluate the best propane patio heaters by their rated heat output.
Frequently asked questions
What is the best alternative for large households needing high flow?
The Rheem RTG 9.5 GPM Outdoor Propane unit stands out as the top pick for large families. It delivers a robust 9.5 GPM flow rate suitable for multiple simultaneous uses. The outdoor, non-condensing design allows for flexible installation where space permits. You get reliable performance without requiring complex venting systems for whole-house heating needs.
Can I use natural gas instead of propane with these units?
Yes, several Rheem models support natural gas for those with existing infrastructure. The Rheem RTG 9.5 GPM Outdoor Natural Gas Heater offers the same 9.5 GPM capacity as its propane counterpart. It maintains the non-condensing outdoor design and precise temperature control. This option suits homes with high hot water demands and outdoor mounting space.
Is there a more compact propane option for outdoor use?
The Rinnai 6.1 GPM Outdoor Propane Water Heater provides a compact alternative for outdoor installations. It delivers a 6.6 GPM flow rate, which is lower than the Rheem 9.5 GPM models. Its silver finish and smaller footprint make it suitable for buyers prioritizing durability and space savings. It fits homes needing moderate hot water flow with strong heat exchanger warranties.
Which unit offers smart home connectivity for whole-house heating?
The Rheem RTG 9.5 GPM Natural Gas Indoor Heater includes WiFi connectivity for smart control. It provides high output for reliable whole-house hot water distribution. The indoor, non-condensing design requires proper venting but offers precise digital management. This model suits buyers who prioritize precision and remote monitoring capabilities over outdoor versatility.
What is the best indoor propane heater for efficiency?
The Rheem RTGH 9.5 GPM Propane Indoor Heater is a high-efficiency choice for large households. It features a 0.93 UEF rating and precise digital control for consistent performance. The indoor design requires venting but delivers 9.5 GPM for multi-bathroom homes. Its gray finish and sturdy build support reliable indoor propane heating needs.
Are there portable options for camping or off-grid use?
The Camplux 5L Portable Propane Water Heater is designed for camping and off-grid showers. It is battery-powered and compact, weighing only 10 pounds. The unit prioritizes portability and low-pressure operation over high flow rates. Its white finish and small dimensions make it ideal for travelers seeking a lightweight, reliable hot water solution.